Sheet Metal Operations — Definition of Notching Notching is best described as which of the following sheet-metal operations?

Introduction / Context:
Sheet-metal fabrication uses a family of cutting and forming operations. Correct terminology prevents tooling errors and ensures the right die is specified for the job.

Given Data / Assumptions:

• Work involves trimming/removing material at or from the edge region of a sheet/plate.
• Operations are performed using press tools or shears.
• Goal is to achieve a specific edge profile or clearance for subsequent forming.

Concept / Approach:
Notching removes material from the edge of a workpiece to a desired shape. It differs from blanking/piercing (which create shapes or holes away from or within the sheet), slitting (long straight cuts), and lancing (partial cut followed by bending without material removal from the sheet).

Step-by-Step Solution:
Identify operation locus: at the edge of the plate/sheet.Define action: remove material to create a notch or profile.Match with definition of notching.Exclude slitting (continuous cut), lancing (partial cut + bend), and general bending.

Verification / Alternative check:
Textbook diagrams show notches for corner relief before bending flanges—material is removed from the edge.

Why Other Options Are Wrong:
Straight-line cut along length describes slitting.Partial cut then bend describes lancing.Curved-axis bending is a forming, not cutting, operation.Piercing away from edge is hole making, not notching.

Common Pitfalls:
Confusing notching with nibbling; nibbling uses successive small punches and may occur away from edges.

Final Answer:
removal of metal to the desired shape from the edge of a plate